TomTom V3 Satellite Navigation with full European Maps.
This price is avaialable at PC World stores via Pricematching either Dixons or Amazon who have it for £129.98. PC World will also give an additional £2 off due to their Pricematch terms "If you find it cheaper at any well known retailer or website we will refund the difference plus 10%". Final price is £127.98.
I just got one from PC World Kensington Street. The Manager was not too happy about it, but they had the pricematch signs all over the checkouts so he could not argue.
This is the 2nd one I have owned (the first was mislaid by my wife whilst out shopping somewhere). It is quite basic, but very easy to use and great for holidays. I have used it in Spain (Valencia) and whilst driving to the South of France without any issues.